<template>
  <div class="login">
    <el-row style="width: 100%">
      <el-col :span="14">
        <!--大标题-->
        <div class="login-title">
          <table style="margin: auto">
            <tr>
              <td>
                <p style="font-size: 60px;color:white;margin:0 4px"><strong>农户收入采集</strong></p>
              </td>
            </tr>
            <tr>
              <td>
                <center><p style="font-size: 60px;color:white;margin:0 4px"><strong>管理系统</strong></p></center>
              </td>
            </tr>
          </table>
        </div>
      </el-col>
      <el-col :span="10">
        <!--登录栏-->
        <div class="kuang">
          <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
            <el-form-item prop="username">
              <el-input
                  v-model="loginForm.username"
                  type="text"
                  size="large"
                  auto-complete="off"
                  placeholder="账号"
              >
                <template #prefix>
                  <svg-icon icon-class="user" class="el-input__icon input-icon"/>
                </template>
              </el-input>
            </el-form-item>
            <el-form-item prop="password">
              <el-input
                  v-model="loginForm.password"
                  type="password"
                  size="large"
                  auto-complete="off"
                  placeholder="密码"
                  @keyup.enter="handleLogin"
              >
                <template #prefix>
                  <svg-icon icon-class="password" class="el-input__icon input-icon"/>
                </template>
              </el-input>
            </el-form-item>
            <el-form-item prop="code" v-if="captchaEnabled">
              <el-input
                  v-model="loginForm.code"
                  size="large"
                  auto-complete="off"
                  placeholder="验证码"
                  style="width: 63%"
                  @keyup.enter="handleLogin"
              >
                <template #prefix>
                  <svg-icon icon-class="validCode" class="el-input__icon input-icon"/>
                </template>
              </el-input>
              <div class="login-code">
                <img :src="codeUrl" @click="getCode" class="login-code-img"/>
              </div>
            </el-form-item>
            <el-checkbox v-model="loginForm.rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
            <el-form-item style="width:100%;">
              <el-button
                  :loading="loading"
                  size="large"
                  type="primary"
                  style="width:100%;"
                  class="login-button"
                  @click.prevent="handleLogin"
              >
                <span v-if="!loading">登 录</span>
                <span v-else>登 录 中...</span>
              </el-button>
              <div style="float: right;" v-if="register">
                <router-link class="link-type" :to="'/register'">立即注册</router-link>
              </div>
            </el-form-item>
          </el-form>
        </div>
      </el-col>
    </el-row>
    <!--  底部  -->
    <div class="el-login-footer">
      <span>Copyright © 2023 <font style="color: #2b2b2b">狗熊岭</font> All Rights Reserved.</span>
    </div>
  </div>
</template>

<script setup>
import {getCodeImg} from "@/api/login";
import Cookies from "js-cookie";
import {encrypt, decrypt} from "@/utils/jsencrypt";
import useUserStore from '@/store/modules/user'

const userStore = useUserStore()
const router = useRouter();
const {proxy} = getCurrentInstance();

const loginForm = ref({
  username: "admin",
  password: "admin123",
  rememberMe: false,
  code: "",
  uuid: ""
});

const loginRules = {
  username: [{required: true, trigger: "blur", message: "请输入您的账号"}],
  password: [{required: true, trigger: "blur", message: "请输入您的密码"}],
  code: [{required: true, trigger: "change", message: "请输入验证码"}]
};

const codeUrl = ref("");
const loading = ref(false);
// 验证码开关
const captchaEnabled = ref(true);
// 注册开关
const register = ref(false);
const redirect = ref(undefined);

function handleLogin() {
  proxy.$refs.loginRef.validate(valid => {
    if (valid) {
      loading.value = true;
      // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
      if (loginForm.value.rememberMe) {
        Cookies.set("username", loginForm.value.username, {expires: 30});
        Cookies.set("password", encrypt(loginForm.value.password), {expires: 30});
        Cookies.set("rememberMe", loginForm.value.rememberMe, {expires: 30});
      } else {
        // 否则移除
        Cookies.remove("username");
        Cookies.remove("password");
        Cookies.remove("rememberMe");
      }
      // 调用action的登录方法
      userStore.login(loginForm.value).then(() => {
        router.push({path: redirect.value || "/"});
      }).catch(() => {
        loading.value = false;
        // 重新获取验证码
        if (captchaEnabled.value) {
          getCode();
        }
      });
    }
  });
}

function getCode() {
  getCodeImg().then(res => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
    if (captchaEnabled.value) {
      codeUrl.value = "data:image/gif;base64," + res.img;
      loginForm.value.uuid = res.uuid;
    }
  });
}

function getCookie() {
  const username = Cookies.get("username");
  const password = Cookies.get("password");
  const rememberMe = Cookies.get("rememberMe");
  loginForm.value = {
    username: username === undefined ? loginForm.value.username : username,
    password: password === undefined ? loginForm.value.password : decrypt(password),
    rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
  };
}

getCode();
getCookie();
</script>

<style lang='scss' scoped>
.login {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-NH-background.png");
  background-size: cover;
}

.login-title {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.login-form {
  background-color: rgba(242,242,242,0.90);
  border-radius: 20px;
  width: 400px;
  padding: 25px 25px 5px 25px;

  .el-input {
    height: 40px;

    input {
      height: 40px;
    }
  }

  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 0px;
  }
}

.login-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}

.login-code {
  width: 33%;
  height: 40px;
  float: right;

  img {
    cursor: pointer;
    vertical-align: middle;
  }
}

.el-login-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}

.login-code-img {
  height: 40px;
  padding-left: 12px;
}

.login-button{
  background-color: #518973;
  border: 0.1rem;
  color: aliceblue;
  font-size: 1.0rem;
  border-radius: 0.5rem;
}

.login-button:hover{
  background-color: #4C695E;
}
</style>
